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      1 /* libunwind - a platform-independent unwind library
      2    Copyright (C) 2003 Hewlett-Packard Co
      3 	Contributed by David Mosberger-Tang <davidm (at) hpl.hp.com>
      4    Copyright (C) 2010 Konstantin Belousov <kib (at) freebsd.org>
      5 
      6 This file is part of libunwind.
      7 
      8 Permission is hereby granted, free of charge, to any person obtaining
      9 a copy of this software and associated documentation files (the
     10 "Software"), to deal in the Software without restriction, including
     11 without limitation the rights to use, copy, modify, merge, publish,
     12 distribute, sublicense, and/or sell copies of the Software, and to
     13 permit persons to whom the Software is furnished to do so, subject to
     14 the following conditions:
     15 
     16 The above copyright notice and this permission notice shall be
     17 included in all copies or substantial portions of the Software.
     18 
     19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
     23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
     26 
     27 #include "_UPT_internal.h"
     28 
     29 #if HAVE_DECL_PTRACE_POKEUSER || HAVE_TTRACE
     30 int
     31 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
     32 		   int write, void *arg)
     33 {
     34   unw_word_t *wp = (unw_word_t *) val;
     35   struct UPT_info *ui = arg;
     36   pid_t pid = ui->pid;
     37   int i;
     38 
     39   if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
     40     return -UNW_EBADREG;
     41 
     42   errno = 0;
     43   if (write)
     44     for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
     45       {
     46 #ifdef HAVE_TTRACE
     47 #	warning No support for ttrace() yet.
     48 #else
     49         /* ANDROID support update. */
     50 	ptrace (PTRACE_POKEUSER, pid, (void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])),
     51 		(void*) wp[i]);
     52         /* End of ANDROID update. */
     53 #endif
     54 	if (errno)
     55 	  return -UNW_EBADREG;
     56       }
     57   else
     58     for (i = 0; i < (int) (sizeof (*val) / sizeof (wp[i])); ++i)
     59       {
     60 #ifdef HAVE_TTRACE
     61 #	warning No support for ttrace() yet.
     62 #else
     63         /* ANDROID support update. */
     64 	wp[i] = ptrace (PTRACE_PEEKUSER, pid,
     65 			(void*) (_UPT_reg_offset[reg] + i * sizeof(wp[i])), 0);
     66         /* End of ANDROID update. */
     67 #endif
     68 	if (errno)
     69 	  return -UNW_EBADREG;
     70       }
     71   return 0;
     72 }
     73 #elif HAVE_DECL_PT_GETFPREGS
     74 int
     75 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
     76 		   int write, void *arg)
     77 {
     78   struct UPT_info *ui = arg;
     79   pid_t pid = ui->pid;
     80   fpregset_t fpreg;
     81 
     82   if ((unsigned) reg >= ARRAY_SIZE (_UPT_reg_offset))
     83     return -UNW_EBADREG;
     84 
     85   if (ptrace(PT_GETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
     86 	  return -UNW_EBADREG;
     87   if (write) {
     88 #if defined(__amd64__)
     89 	  memcpy(&fpreg.fpr_xacc[reg], val, sizeof(unw_fpreg_t));
     90 #elif defined(__i386__)
     91 	  memcpy(&fpreg.fpr_acc[reg], val, sizeof(unw_fpreg_t));
     92 #else
     93 #error Fix me
     94 #endif
     95 	  if (ptrace(PT_SETFPREGS, pid, (caddr_t)&fpreg, 0) == -1)
     96 		  return -UNW_EBADREG;
     97   } else
     98 #if defined(__amd64__)
     99 	  memcpy(val, &fpreg.fpr_xacc[reg], sizeof(unw_fpreg_t));
    100 #elif defined(__i386__)
    101 	  memcpy(val, &fpreg.fpr_acc[reg], sizeof(unw_fpreg_t));
    102 #else
    103 #error Fix me
    104 #endif
    105   return 0;
    106 }
    107 /* ANDROID support update. */
    108 #elif defined(__mips__) || defined(__aarch64__)
    109 int
    110 _UPT_access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
    111 		   int write, void *arg)
    112 {
    113 # pragma message("_UPT_access_fpreg is not implemented and not currently used.")
    114   return -UNW_EBADREG;
    115 }
    116 /* End of ANDROID update. */
    117 #else
    118 #error Fix me
    119 #endif
    120